20488313 has 2 divisors, whose sum is σ = 20488314. Its totient is φ = 20488312.

The previous prime is 20488309. The next prime is 20488333. The reversal of 20488313 is 31388402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20178064 + 310249 = 4492^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 20488313 - 2² = 20488309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20488333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244156 + 10244157.

It is an arithmetic number, because the mean of its divisors is an integer number (10244157).

Almost surely, 2^20488313 is an apocalyptic number.

It is an amenable number.

20488313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488313 is an equidigital number, since it uses as much as digits as its factorization.

20488313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20488313 is about 4526.4017718272. The cubic root of 20488313 is about 273.6331647681.

The spelling of 20488313 in words is "twenty million, four hundred eighty-eight thousand, three hundred thirteen".